Cat is peeing spraying on base of gas furnace. How do I stop this?

You could buy a can of Cat Repellent, I recommend Lambert Kay Boundary Indoor/Outdoor Cat Repellent. Just spay it daily around your furnace and hopefully your cat will leave the area alone. It worked great on my cats, but some people have stingy cats.

You can use a Scat Mat . It is an electric pad that will give the cat a shock when it steps on it. You place the mat in front of the furnace. That will discourage the behavior.

First and foremost, make sure kitty is healthy. Take him to the vet and have him checked out – sudden changes in litterbox behaviour can sometimes mean health problems.

Is there a door to the area that you can just keep closed, making it inaccessible to your cat?

Also you can use a citrus spray, cats dislike citrus, I’d also go along with the advice from @Stefaniebby & @Seelix But @worriedguy does worry me a bit, as being a little extreme to say the least.. Hope something works out :-/

@Scooby The device gives a low current shock. It is powered by a 9 volt battery. (Not like an electric fence.) You can touch it with your hand. It feels like a buzzing. My neighbor keeps one of these on her couch and on the kitchen counter.
It works.

@worriedguy

Fair comment, it works… I ‘m not too sure about electric deterrents for cats, live stock maybe :-/
It’s just not something I could endorse myself.. that’s all :-/

Set a few wooden mouse traps around the base and cover them with an old sheet or newspaper. When the cat steps into the area she won’t be hurt but the sudden noise and motion of the springing trap will scare her away.
I’ve used this method on my kitchen counters and under the Christmas tree skirt every year with success for my stubborn cat who isn’t affected by deterrent sprays.

@Blueroses that is really smart.

@pallen123 is your cat spayed/neutered?

@Blueroses: I love the mouse trap idea!
going to give it a whirl for discouraging our pets from getting on the chairs

@Scooby Have you ever put your tongue on a 9V battery? (Of course you have.) The Scat mat is much less. It is like a buzzing from a motor ora bad ground on an appliance. Unnatural feeling.
“It’s just not something I could endorse myself.” – Fair enough. ;-)

@worriedguy

I’d go for this myself, if my two were giving me trouble… :-/

Get rid of the rutting cat.

My guess is that the cat isn’t peeing, it’s actually spraying because it is in heat. One option is to get the cat neutered. Their spray is much worse than their pee and it’s not a “change in litter habits” so the vet isn’t going to be able to stop it unless the cat is neutered.

I had a male cat that did this and after that first time, he was officially an outdoor cat.

Neuter your kitty and problem solved. It’s not that expensive.